.\"
.\" Copyright 1998 by the Massachusetts Institute of Technology.
.\"
.\" Permission to use, copy, modify, and distribute this
.\" software and its documentation for any purpose and without
.\" fee is hereby granted, provided that the above copyright
.\" notice appear in all copies and that both that copyright
.\" notice and this permission notice appear in supporting
.\" documentation, and that the name of M.I.T. not be used in
.\" advertising or publicity pertaining to distribution of the
.\" software without specific, written prior permission.
.\" M.I.T. makes no representations about the suitability of
.\" this software for any purpose.  It is provided "as is"
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.\"
.TH ARES_TIMEOUT 3 "25 July 1998"
.SH NAME
ares_fds \- Get file descriptors to select on for name service
.SH SYNOPSIS
.nf
.B #include <ares.h>
.PP
.B struct timeval *ares_timeout(ares_channel \fIchannel\fP,
.B	struct timeval *\fImaxtv\fP, struct timeval *\fItvbuf\fP)
.fi
.SH DESCRIPTION
The
.B ares_timeout
function determines the maximum time for which the caller should wait
before invoking 
.BR ares_process (3)
to process timeouts.  The parameter
.I maxtv
specifies a existing maximum timeout, or
.B NULL
if the caller does not wish to apply a maximum timeout.  The parameter
.I tvbuf
must point to a writable buffer of type
.BR "struct timeval" .
It is valid for
.I maxtv
and
.I tvbuf
to have the same value.
.PP
If no queries have timeouts pending sooner than the given maximum
timeout,
.B ares_timeout
returns the value of
.IR maxtv;
otherwise
.B ares_timeout
stores the appropriate timeout value into the buffer pointed to by
.I tvbuf
and returns the value of
.IR tvbuf .
.SH SEE ALSO
.BR ares_fds (3),
.BR ares_process (3)
.SH AUTHOR
Greg Hudson, MIT Information Systems
.br
Copyright 1998 by the Massachusetts Institute of Technology.
